Those mysterious blobs and patterns that bedazzle the backs of your eyelids are no illusion. What you see is real light — and it’s coming from inside your eyes.
Why some people see fewer colors than others and why women are more likely to be super seers
Colorblind children encounter unseen challenges in the classroom
Pigeons and honeybees discriminate between artistic styles
Spiky echinoderms use spines for complex vision